Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
tests duales » tests dalekjs, tests des, neues duales
filosofia la » filosofia da, filosofia le, filosofica da
studium e » studium 1, studium 8, studium 5
studium 3 » studium 1, studium 8, studium im

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tests duales ((((studium e) OR (studium 3))) OR (studium _)) filosofia la literatura*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tests duales ((((studium e) OR (studium 3))) or (studium _)) filosofia la literatura*".